Get User Position Guide

clear;

Tobii = EyeTrackingOperations();

eyetracker_address = 'Address of the desired device';
% Example:
% eyetracker_address = 'tet-tcp://10.46.32.51';
try
    eyetracker = Tobii.get_eyetracker(eyetracker_address);
catch ME
    if (strcmp(ME.identifier,'EyeTrackerGet:error204'))
        fprintf('Unable to connect eye tracker.\n');
        return
    end
end

% The first call subscribes to the stream and returns either data
% (might be empty if no data has been received yet) or any error that
% happened during the subscription.
try
    eyetracker.get_user_position_guide();
catch ME
    fprintf(ME.message);
    return
end
pause(1);
result = eyetracker.get_user_position_guide();

if isa(result,'StreamError')
    fprintf('Error: %s\n',string(result.Error.value));
    fprintf('Source: %s\n',string(result.Source.value));
    fprintf('SystemTimeStamp: %d\n',result.SystemTimeStamp);
    fprintf('Message: %s\n',result.Message);

elseif isa(result,'UserPositionGuide')

    % Collect data for 1 seconds.
    pause(1);

    % The subsequent calls return the current values in the stream buffer.
    % If a flat structure is prefered just use an extra input 'flat'.
    % i.e. user_position_guide = eyetracker.get_user_position_guide('flat');
    user_position_guide = eyetracker.get_user_position_guide();

    eyetracker.stop_user_position_guide();

    disp('Left Eye');

    fprintf('UserPositionGuide.Position: %.2f %.2f %.2f\n',user_position_guide.LeftEye.Position);
    fprintf('UserPositionGuide.Validity: %d\n',user_position_guide.LeftEye.Validity.value);

    disp('Right Eye');

    fprintf('UserPositionGuide.Position: %.2f %.2f %.2f\n',user_position_guide.RightEye.Position);
    fprintf('UserPositionGuide.Validity: %d\n',user_position_guide.RightEye.Validity.value);
end